Clockworks with electric winding device



Oct. 14, 1930. J. GEISSLINGER 1,778,072

CLOCK WORKS WI TH ELECTRIC WINDING DEVICE Filed Sept. 26, 1928 INVEN TOR. 2 6 6/ 55// I776)" BY W 7% A TTORNEYS.

Patented Get. 14, 193i? UNITE STATE ATENT FFICE JEAN GEISSLINGER, OF FOREST HILLS, NEW' YORK, ASSIG-NOR TO EMILE BECK, OF GENEVA, SWITZERLAND CLOCKWQRKS "W 1TH ELECTRIC VJIFZQ'DING DEVICE Application filed September 26, 1928, Serial No. 308,430, and in Switzerland October 5, 1927.

'll is invention relates to clock-works provided with electric winding devices of the kind wherein a ratchet wheel cooperates with a driving pawl and a locking pawl, the driving pawl being operated by the armature of an electromagnet.

The object of the invention is to provide a device of the above indicated character in which each one of the two pawls forms a ino'able contact-piece of the circuit interrupter of the electro-magnet.

The accompanying drawings illustrate by way of example a practical embodiment of the invention.

Fig. 1 is a plan view and 2 an elevation of the device. Figs. 3 and '4 show some details drawn to a larger scale.

1 is the pillar-plate supporting the clockmovement, which is not illustrated, and the electro-inagnet 2 acting upon its armature 3 which is provided with the antagonistic spring 4C. To the armature 1s hinged the drivr m -t meqi Y 1 6 mg paw o operating iie raw it w cei which engages the clock-movement and is heid against reverse rotating by the locking pawl One of the poles of the source of current .iected to the pillar plate in 8, the other pole leads to the insulated terminal 9 mounted on the carcass oi the electro-magnet; from there the current flows through the coil oi the eleetro-inagnet, then through the insulated wire 10 to the spring blade 11 mounted on the locking pawl 7 with the intermediary or" an insulating layer 12.

The Figure t shows the pawl 5 almost at the end of a driving stroke. The locking pawl C is on top or" one of the teeth of the ratchet wheel 6; the moment when the pawl 5 completes its driving stroke, the pawl 7 falls into the space between two adjacent teeth (see Fig. 3) and contact is made between the two pawls 5 and 7 The circuit of the electromagnet is closed and the armature 3 is attracted until the pawl 5 has been pulled back over one tooth of the ratchet wheel; then the contact is broken between the two pawls the armature is pulled oii by the spring t where by the pawl 5 turns the ratchet wheel for one tooth.

i '4' falls abruptly into the space teeth the circuit is closed very suddenly; when the pawl 5 is pulled back wards owing to the action of the electroinagnet upon its armature, it stays in contact with the spring blade 11 during the greater part of its stroke while at the same time it is being deplaced with regard to this contact; theretore a friction is brought about between the two contacts maintaining the suri'aces in good condition and preventing the forma ion of an oxide layer.

1 claim:

An electric clock comprising a ratchet wheel, an electric circuit, an electromagnet included in said circuit and provided with an armature, a driving pawl for said ratchet wheel, said driving pawl being hingedly secured to th armature and included in said circuit, an insulatediy mounted locking pawl, 

